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Gears| Name | Picture | Quantity | Location | Comment |
| Gear, 8-tooth, straight |  | 8 | B3 | Mesh with gears in same plane |
| Gear, 12-tooth, bevel |  | 8 | B3 | Mesh at 90 degrees - use in differential |
| Gear, 12-tooth, double bevel |  | 2 | B3 | Can mesh at range of angles |
| Gear, 16-tooth, straight |  | 7 | B3 | Mesh with gears in same plane |
| Gear, 16-tooth, clutch |  | 2 | B3 | Use as pair for clutch, or as simple gear |
| Worm Screw |  | 3 | B3 | Use for big speed reductions |
| Technic rotor, 4-arm |  | 2 | B3 | ? |
| Gear, 20-tooth, bevel |  | 2 | E | Mesh at 90 degrees with another bevel gear |
| Gear, 20-tooth, double bevel |  | 2 | E | Can mesh at range of angles |
| Gear, 24-tooth, crown |  | 4 | E | Mesh at 90 degrees with straight gear |
| Gear, 24-tooth, straight |  | 8 | E | Mesh with gears in same plane |
| Gear, 36-tooth, double bevel |  | 2 | E | Can mesh at range of angles |
| Gear, 40-tooth, straight |  | 6 | E | Mesh with gears in same plane |
| Pulley, large |  | 3 | E | Alternative to gears, use elastic drive bands |
| Pulley, small |  | 2 | E | Use as pulley, also hub of small thin wheel |
| Rack, 10-tooth |  | 4 | E | Convert rotation to linear motion |
| Differential housing |  | 1 | E | Use to drive 2 wheels from one motor |
| Turntable |  | 1 | E | For large rotating structure |
| Double-ended gear bar |  | 2 | E | ? |
| Sextant, 8 tooth |  | 2 | E | ? |
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